add dep management

vendor/github.com/konsorten/go-windows-terminal-sequences/sequences.go

@@ -0,0 +1,36 @@
+// +build windows
+
+package sequences
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+var (
+	kernel32Dll    *syscall.LazyDLL  = syscall.NewLazyDLL("Kernel32.dll")
+	setConsoleMode *syscall.LazyProc = kernel32Dll.NewProc("SetConsoleMode")
+)
+
+func EnableVirtualTerminalProcessing(stream syscall.Handle, enable bool) error {
+	const ENABLE_VIRTUAL_TERMINAL_PROCESSING uint32 = 0x4
+
+	var mode uint32
+	err := syscall.GetConsoleMode(syscall.Stdout, &mode)
+	if err != nil {
+		return err
+	}
+
+	if enable {
+		mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING
+	} else {
+		mode &^= ENABLE_VIRTUAL_TERMINAL_PROCESSING
+	}
+
+	ret, _, err := setConsoleMode.Call(uintptr(unsafe.Pointer(stream)), uintptr(mode))
+	if ret == 0 {
+		return err
+	}
+
+	return nil
+}